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2. Rhynchostylis gigantea (Lindley) Ridley, J. Linn. Soc., Bot.<br />
32: 356. 1896.<br />
海南钻喙兰 hai nan zuan hui lan<br />
Saccolabium giganteum Lindley, Gen. Sp. Orchid. Pl. 221.<br />
1833; Anota densiflora (Lindley) Schlechter; A. gigantea (Lindley)<br />
Fukuyama; A. hainanensis (Rolfe) Schlechter; Gastrochilus<br />
giganteus (Lindley) Kuntze; Vanda densiflora Lindley; V.<br />
hainanensis Rolfe.<br />
Stems erect, 4–13 cm or longer, stout, ca. 2 cm in diam.,<br />
many leaved. Leaves broadly lorate, 20–40 cm, fleshy, with amplexicaul<br />
sheaths at base, apex obtuse and unequally bilobed.<br />
Inflorescences 2–4, usually arching, 14–30 cm, densely many<br />
flowered; rachis 10–20 cm, thick; floral bracts often reflexed,<br />
EPIDENDROIDEAE<br />
475<br />
broadly ovate, ca. 5 mm. Flowers thickly textured, white spotted<br />
with purplish red, lip deep purplish red, column purplish<br />
red, anther cap white. Sepals similar, elliptic-oblong, 12–17 ×<br />
9–10 mm, obtuse. Petals oblong, smaller than sepals, base contracted,<br />
apex obtuse; lip subobovate, ca. 17 × 12 mm, fleshy,<br />
base with a pair of ridges, margin 3-lobed; lateral lobes erect,<br />
subelliptic; mid-lobe very small, retuse; disk slightly papillate;<br />
spur narrowly conic, ca. 5 mm, inside densely white hairy. Column<br />
ca. 4 mm, thick, foot very short or indistinct; rostellum<br />
suborbicular; stipe linear, ca. 2 mm, apex ± dilated; viscidium<br />
lanceolate. Capsule obovoid, ca. 4 cm. Fl. Jan–Apr, fr. Feb–<br />
May. 2n = 38.<br />
Epiphytic on tree trunks in open forests; ca. 1000 m. Hainan<br />
[Cambodia, Indonesia, Laos, Malaysia, Myanmar, Singapore, Thailand,<br />
Vietnam].<br />
172. UNCIFERA Lindley, J. Proc. Linn. Soc., Bot. 3: 39. 1858.<br />
叉喙兰属 cha hui lan shu<br />
Chen Xinqi (陈心启 Chen Sing-chi); Jeffrey J. Wood<br />
Herbs, epiphytic, monopodial. Roots not piercing leaf sheaths. Stems usually pendulous, elongate, slender, leafy. Leaves overlapping,<br />
distichous, flat, oblong to lanceolate, slightly fleshy, base amplexicaul, sheathing, jointed, apex unequally bilobed or praemorse.<br />
Inflorescence axillary, racemose, densely few to many flowered. Flowers thickly textured. Sepals and petals similar, concave;<br />
lateral sepals slightly oblique. Petals slightly smaller than sepals; lip funnel-shaped, spurred, 3-lobed, lateral lobes suberect; mid-lobe<br />
very small, fleshy, adaxially ± concave; spur long, hooked or curved, inside unornamented. Column terete, bent down over spur entrance,<br />
footless; rostellum conspicuous, thick; anther cap conic, apex elongate and narrowed; pollinia waxy, 2, globose, deeply cleft,<br />
separated by a hyaline flange, attached by a common long, linear stipe to a large viscidium; stipe wings borne on a ridge formed by<br />
basal part of rostellum.<br />
About six species: from tropical Himalayan regions to Indochina and Thailand; two species in China.<br />
1a. Apex of spur strongly curved forward and hooked ................................................................................................... 1. U. acuminata<br />
1b. Apex of spur curved backward toward ovary ........................................................................................................... 2. U. thailandica<br />
1. Uncifera acuminata Lindley, J. Proc. Linn. Soc., Bot. 3: 40.<br />
1858.<br />
叉喙兰 cha hui lan<br />
Saccolabium acuminatum (Lindley) J. D. Hooker.<br />
Stems often arching, terete, 5–27 cm, slender, 3–4 mm in<br />
diam., many noded, internodes 1–2 cm. Leaf blade lanceolate or<br />
obliquely oblong, 4–10.5 × 0.7–1.5 cm, acute and slightly praemorse.<br />
Inflorescence arching, 7–10 cm, densely many flowered;<br />
floral bracts ovate, 3–6 mm. Flowers not opening widely, yellowish<br />
green, slightly fleshy; pedicel and ovary 5–7 mm. Sepals<br />
cymbiform, broadly ovate, 6–7 × ca. 5 mm, obtuse. Petals<br />
ovate, ca. 6 × 4 mm, obtuse; lip with a long spur at base, 3lobed;<br />
lateral lobes erect, suborbicular, large, 5–6 mm wide;<br />
mid-lobe ovate-triangular, very small, fleshy, adaxially shallowly<br />
concave, apex obtuse; spur funnel-shaped, strongly<br />
curved forward and hooked, ca. 15 mm. Column ca. 3 mm;<br />
rostellum large, fleshy; anther cap subconic; stipe ca. 3 mm;<br />
viscidium oblong, ca. 3 mm. Fl. Apr–Jul.<br />
Epiphytic on tree trunks in dense forests; 1300–1900 m. Guizhou,<br />
S Yunnan [Bhutan, NE India, Nepal].<br />
2. Uncifera thailandica Seidenfaden & Smitinand, Orchids<br />
Thailand 4(2): 828. 1965.<br />
中泰叉喙兰 zhong tai cha hui lan<br />
Stems short, internodes ca. 10 mm. Leaf blade ligulate,<br />
10–12 × ca. 2 cm, unequally obtusely bilobed. Inflorescence<br />
gently curving; peduncle 4–6 cm; rachis 7–10 cm, many flowered.<br />
Flowers: sepals light purple edged white, petals light<br />
greenish with a purple central spot, lip white with a purple spot<br />
near apex of blade; pedicel and ovary 9–10 mm. Dorsal sepal<br />
concave, ca. 7 × 4.5 mm; lateral sepals ca. 7 × 5 mm. Petals ca.<br />
6.3 × 5 mm; lip lateral lobes insignificant, triangular with broad<br />
base, less than 1 mm high, ca. 1.5 mm wide at base; mid-lobe<br />
very fat, with 2 small lobes turned backward; spur sigmoid, apex<br />
turned backward toward ovary. Column very short, tip of rostellum<br />
hidden in opening of sac.<br />
Epiphytic in evergreen forests; ca. 1400 m. Yunnan (Yingjiang)<br />
[Thailand].<br />
173. ROBIQUETIA Gaudichaud, Voy. Uranie, Bot. 426. 1829.<br />
寄树兰属 ji shu lan shu<br />
Chen Xinqi (陈心启 Chen Sing-chi); Jeffrey J. Wood